CN218378125U

CN218378125U - Dual leak-proof hard connection structure

Info

Publication number: CN218378125U
Application number: CN202221853263.3U
Authority: CN
Inventors: 毛久富
Original assignee: Xinnengke Electric Co ltd
Current assignee: Xinnengke Electric Co ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2023-01-24
Anticipated expiration: 2032-07-18

Abstract

The utility model discloses a hard connection structure of dual leak protection, include: the first connecting piece is tubular and hollow along the axial direction, and the two ends of the first connecting piece are respectively a first connecting end and a second connecting end; the second connecting piece is tubular and hollow along the axial direction, and a third connecting end and a fourth connecting end are respectively arranged at two ends of the second connecting piece; the locking part passes through the second connecting part to be in threaded connection with the first connecting part, a radially protruding pressing part is arranged on the inner wall of the locking part, the pressing part and the end face of the boss are tightly attached to each other, and the pressing part has axial pressure towards the direction of a third connecting end on the boss; the external pipeline can be used for receiving water or gas, particularly, the double anti-leakage hard connecting structure is applied to hot water equipment or steam equipment, the first connecting piece and the second connecting piece are connected hard, the use of a sealing ring can be omitted, the overall structure is simple, the installation is convenient, and the sealing degree between the conical surface and the tight joint part can be adjusted at any time through the locking piece.

Description

Dual leak-proof hard connection structure

Technical Field

The utility model relates to a body coupling accessory, in particular to hard connection structure of dual leak protection.

Background

In equipment such as a hot water boiler or a steam boiler, a pipe connection is often required. The location of the pipe connections requires a high requirement for tightness. The sealing structure is usually in a sealing ring or sealing glue mode, but the service life of the sealing structure is short due to the fact that hot water or steam is conveyed through a pipeline, the use cost is improved due to frequent replacement, and potential safety hazards exist. The existing hard connection sealing structure uses a joint surface for sealing, and the machining size precision requirement of the joint surface is high and the cost is high.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve at least one of the above-mentioned technical problems in the related art to a certain extent. Therefore, the utility model provides a hard connection structure of dual leak protection.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

according to the utility model discloses a dual leak protection rigid connection structure of first aspect embodiment, include:

the first connecting piece is tubular and hollow in the axial direction, a first connecting end and a second connecting end are respectively arranged at two ends of the first connecting piece, the inner wall of the second connecting end is a conical surface with the inner diameter gradually reduced towards the direction of the first connecting end, and external threads are arranged on the outer wall, close to the first connecting end, of the first connecting piece;

the second connecting piece is tubular, the interior of the second connecting piece is hollow along the axial direction, a third connecting end and a fourth connecting end are arranged at two ends of the second connecting piece respectively, a sealing part is arranged on the outer wall of the second connecting piece, the sealing part is in an arc surface shape which is gradually reduced towards the third connecting end along the axial direction, a boss which protrudes along the radial direction is arranged at the position, close to the fourth connecting end, of the sealing part, the third connecting end is inserted into the second connecting end, and the outer wall of the sealing part is abutted to the conical surface;

the retaining member, the retaining member passes the second connecting piece with first connecting piece carries out threaded connection, be equipped with radial convex portion of sticising on the inner wall of retaining member, the portion of sticising with the terminal surface of boss is hugged closely each other, the portion of sticising is right the boss has the orientation the axial pressure of third connecting end direction.

According to the utility model discloses dual leak protection hard connection structure has following beneficial effect at least: the external pipeline can be used for receiving water or gas, particularly, the double-leakage-proof hard connecting structure is applied to hot water equipment or steam equipment, the first connecting piece and the second connecting piece are connected hard, the use of a sealing ring can be omitted, the overall structure is simple, the installation is convenient, and the sealing degree between the conical surface and the joint sealing part can be adjusted at any time through the locking piece.

According to some embodiments of the present invention, the inner hollow part of the first connecting member close to the first connecting end comprises a conveying part and a guiding part which are distributed in a stepped manner, the guiding part is located between the conveying part and the conical surface, the inner diameter of the guiding part is larger than that of the conveying part, and the guiding part extends along the small end of the conical surface; the outer wall of the second connecting piece between the third connecting end and the sealing part is an inserting part, and the inserting part is matched and inserted with the guide part.

According to some embodiments of the invention, the boss with the terminal surface of the portion butt that sticiss is the flush end face.

According to some embodiments of the present invention, the outer wall of the first connecting member is provided with a limiting portion, the limiting portion protrudes in a radial direction, and the limiting portion is located at an end of the external thread close to the first connecting end; when the retaining member presses the second connecting member, a certain distance is formed between the end part of the retaining member facing the first connecting end and the limiting part.

According to some embodiments of the utility model, the external diameter of boss is greater than the biggest external diameter of joint portion.

According to some embodiments of the present invention, the first connection end is provided with a flare therein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded cross-sectional view of the present invention;

fig. 2 is a sectional view of the assembly structure of the present invention.

Reference numerals are as follows:

a first connecting member 100; a first connection end 101; a second connection end 102; a tapered surface 110; an external thread 120; a stopper 130; a conveying section 140; a guide portion 150;

a second connector 200; a third connection end 201; a fourth connection 202; a sealing part 210; a boss 220; a plug-in part 230;

a locker 300; a compression section 310.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The utility model relates to a dual leak protection rigid connection structure, including first connecting piece 100, second connecting piece 200 and retaining member 300.

As shown in fig. 1, the first connecting member 100 is a tubular structure, preferably a circular tube, the interior of the first connecting member 100 is hollow, the first connecting member 100 is placed in the direction shown in the figure, the right end of the first connecting member 100 is a first connecting end 101, the left end is a second connecting end 102, and the interior of the first connecting member 100 is through along the axial direction. The hollow interior of the first connector 100 may be cylindrical, and the inner wall of the second connector 102 may be tapered 110, the tapered 110 being conical. The tapered surface 110 tapers from the second connection end 102 toward the first connection end 101. An external thread 120 is provided on an outer wall of the first connecting member 100, and the external thread 120 extends spirally from the second connecting end 102 toward the first connecting end 101. The external threads 120 may be distributed over the outer wall of the first connector 100, or may be disposed on a portion of the outer wall of the first connector 100 adjacent to the second connector 102.

As shown in fig. 1, the second connector 200 has a tubular shape, and may have a circular tubular shape. The second connector 200 is disposed in the direction shown in the figure, and the right end of the second connector 200 is a third connection end 201 and the left end is a fourth connection end 202. The second connector 200 has an inner portion that extends in the axial direction. A sealing part 210 is provided on an outer wall of the second connector 200. The outer wall of the sealing portion 210 has an arc-surface shape, and the arc shape of the outer wall of the sealing portion 210 gradually decreases from left to right when viewed in a cross section parallel to the axis of the second link 200. At the end of the tight-fit portion 210 facing the fourth connection end 202, a boss 220 is provided, and the boss 220 protrudes in the radial direction of the second connector 200. The outer diameter of the boss 220 is larger than the maximum distance of the sealing part 210 relative to the central axis of the second connector 200. The side of the boss 220 facing the fourth connection end 202 is flat. The third connection end 201 of the second connection member 200 is inserted into the second connection end 102 of the first connection member 100, and the outer wall of the sealing portion 210 abuts on the tapered surface 110 inside the first connection member 100, that is, the outer wall of the sealing portion 210 is tangent to the tapered surface 110. Compared with the structure that two conical surfaces are tightly connected with each other, the arc-shaped tight connection part 210 and the conical surface 110 are mutually abutted, so that the abutting tightness of the two conical surfaces can be further ensured, and the same taper of the two conical surfaces is not required to be ensured.

As shown in fig. 1, the locker 300 is in the form of a nut, and the inner wall of the locker 300 is provided with internal threads which are engaged with the external threads 120 of the first connector 100. In the illustrated direction, the inner wall of the left end of the locker 300 is provided with a pressing part 310, and the pressing part 310 protrudes in a radial direction toward the central axis of the locker 300. The inner diameter of the compression part 310 is smaller than the outer diameter of the boss 220.

As shown in fig. 2, the third connecting end 201 of the second connecting member 200 is coaxially inserted into the second connecting end 102 of the first connecting member 100, the locker 300 is inserted into the right from the fourth connecting end 202, the locker 300 passes through the second connecting member 200, and the internal thread of the locker 300 is threadedly connected with the external thread 120 of the first connecting member 100. Retaining member 300 is threaded progressively axially from left to right into first coupling member 100. The end face of the pressing part 310 facing to the right is abutted against the end face of the boss 220 facing to the left, and the contact between the pressing part 310 and the boss 220 exerts an action pressure of pushing the second connecting piece 200 to the right in the axial direction. The part of the sealing part 210 and the part of the tapered surface 110 abut against each other, and the position where the sealing part 210 and the tapered surface 110 abut against each other forms a closed-loop seal around the central axis. The first connector 100 and the second connector 200 are communicated with each other at the hollow portion of the inside thereof. The tightening force of the sealing portion 210 against the tapered surface 110 is controlled and adjusted according to the force of the locking member 300 against the second connecting member 200, and the contact surface between the projection 220 and the tightening portion 310 is tightly abutted to form a secondary seal. The first connecting end 101 may be formed with a flared opening therein, and when in use, the first connecting end 101 of the first connecting member 100 is used for connecting a first external pipe, and the fourth connecting end 202 of the second connecting member 200 is used for connecting a second external pipe. The first connector 100, the second connector 200 and the locking member 300 are used for realizing hard connection of two external pipes, and the sealing connection is realized by the abutting between the sealing part 210 and the conical surface 110, between the boss 220 and the pressing part 310. The external pipeline can be used for receiving water or gas, especially the hard connection structure of dual leak protection is used to hot water equipment or steam equipment, and the use of sealing washer can be saved to the hard connection of first connecting piece 100 and second connecting piece 200, avoids appearing the problem that the sealing washer influences sealed effect because of thermal deformation. The whole structure is simple, the installation is convenient, and the sealing degree between the conical surface 110 and the tight joint part 210 can be adjusted at any time through the locking piece 300.

In some embodiments of the present invention, as shown in fig. 1, the first connecting member 100 is hollow inside, the hollow inside of the first connecting member 100 includes a conveying portion 140 and a guiding portion 150, the conveying portion 140 and the guiding portion 150 are located at the right side of the tapered surface 110, the conveying portion 140 is adjacent to the first connecting end 101, and the guiding portion 150 is located between the conveying portion 140 and the tapered surface 110. The inner diameter of the conveying part 140 is smaller than that of the guide part 150, and the conveying part 140 and the guide part 150 are distributed in a stepped shape. The hollow interiors of the conveying part 140 and the guide part 150 are both cylindrical. The guide part 150 extends along the small end of the tapered surface 110 (facing the first connection end 101, that is, the inner diameter of the guide part 150 is the same as the small end of the tapered surface 110. The position on the second connection part 200 adjacent to the third connection end 201 is defined as the insertion part 230, the insertion part 230 is located on the right side of the sealing part 210. The insertion part 230 is in a hollow cylindrical shape, the insertion part 230 is in fit insertion with the guide part 150. The outer diameter of the insertion part 230 is slightly smaller than the inner diameter of the guide part 150, and may be different by 0.1-0.2mm. During installation, the third connection end 201 is inserted into the second connection end 102, and the insertion part 230 is inserted into the guide part 150 in a fit manner, so that the first connection part 100 and the second connection part 200 are coaxial, which is equivalent to radially positioning the first connection part 100 and the second connection part 200, and avoiding that the second connection part 200 deflects relative to the first connection part 100 to affect installation when the sealing part 210 abuts against the tapered surface 110.

In some embodiments of the utility model, in order to improve the boss 220 and sticis the degree of tightness between the portion 310, the left end face of boss 220 and the right-hand member face that sticiss portion 310 all are with the flush end face of radial extension, and both laminating are sealed, and can guarantee the effect that compresses tightly of portion 310 to the boss 220.

In some embodiments of the present invention, a position-limiting portion 130 is disposed on an outer wall of the first connecting member 100. The stopper 130 protrudes outward from the outer wall edge of the first connector 100. The stopper 130 is located at an end of the external thread 120 of the first connector 100 near the first connection end 101. When the locking member 300 is rotated to lock the second connector 200, the tight-contact portion 210 abuts against the tapered surface 110 to restrict the locking member 300 from moving, and a certain space is formed between the end of the locking member 300 and the limiting portion 130. When the end of the locking member 300 is attached to the position-limiting portion 130, i.e., the abrasion between the sealing portion 210 and the tapered surface 110 is too large, the worker is prompted that the first connecting member 100 or the second connecting member 200 needs to be replaced.

In the description of the present specification, references to the description of "some specific embodiments" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A dual leak-proof hard connection structure, comprising:

the connecting structure comprises a first connecting piece (100), wherein the first connecting piece (100) is tubular, the interior of the first connecting piece (100) is hollow along the axial direction, a first connecting end (101) and a second connecting end (102) are respectively arranged at two ends of the first connecting piece (100), the inner wall of the second connecting end (102) is a conical surface (110) with the inner diameter gradually reduced towards the direction of the first connecting end (101), and external threads (120) are arranged on the outer wall, close to the first connecting end (101), of the first connecting piece (100);

the second connecting piece (200) is tubular, the interior of the second connecting piece (200) is hollow along the axial direction, a third connecting end (201) and a fourth connecting end (202) are respectively arranged at two ends of the second connecting piece (200), a sealing part (210) is arranged on the outer wall of the second connecting piece (200), the sealing part (210) is in an arc surface shape which is gradually reduced towards the third connecting end (201) along the axial direction, a boss (220) which protrudes along the radial direction is arranged at a position, close to the fourth connecting end (202), of the sealing part (210), the third connecting end (201) is inserted into the second connecting end (102), and the outer wall of the sealing part (210) is abutted to the conical surface (110);

retaining member (300), retaining member (300) pass second connecting piece (200) with first connecting piece (100) carry out threaded connection, be equipped with radial convex sticising portion (310) on the inner wall of retaining member (300), pressfitting portion (310) with the terminal surface of boss (220) is hugged closely each other, pressfitting portion (310) are right boss (220) have the orientation the axial pressure of third link (201) direction.

2. The dual leak-proof, hard-wired structure of claim 1, wherein: the first connecting piece (100) comprises a conveying part (140) and a guide part (150) which are distributed in a stepped manner at the position, close to the inner hollow part of the first connecting end (101), the guide part (150) is positioned between the conveying part (140) and the conical surface (110), the inner diameter of the guide part (150) is larger than that of the conveying part (140), and the guide part (150) extends along the small end of the conical surface (110); the outer wall of the second connecting piece (200) between the third connecting end (201) and the sealing part (210) is an inserting part (230), and the inserting part (230) is matched and inserted with the guide part (150).

3. The dual leak-proof, hard-wired structure of claim 1, wherein: the end face where the boss (220) and the pressing portion (310) are abutted is a flat end face.

4. The dual leak-proof hard-connect structure of claim 1, wherein: a limiting part (130) is arranged on the outer wall of the first connecting piece (100), the limiting part (130) protrudes in the radial direction, and the limiting part (130) is located at the end part, close to the first connecting end (101), of the external thread (120); when the retaining member (300) presses the second connecting member (200), a certain distance is formed between the end of the retaining member (300) facing the first connecting end (101) and the limiting portion (130).

5. The dual leak-proof hard-connect structure of claim 1, wherein: the outer diameter of the boss (220) is larger than the maximum outer diameter of the sealing part (210).

6. The dual leak-proof hard-connect structure of claim 1, wherein: and a flared opening is formed in the first connecting end (101).